CN101222160A

CN101222160A - Electric motor with releasable connection used for printed circuit-board assembly

Info

Publication number: CN101222160A
Application number: CNA2007100022015A
Authority: CN
Inventors: 黄道凡; 张宏伟
Original assignee: Johnson Electric SA
Current assignee: Johnson Electric SA
Priority date: 2007-01-12
Filing date: 2007-01-12
Publication date: 2008-07-16

Abstract

A electric motor (10) comprises a motor shell body (12), a stator (16) accommodated in the shell body, a shaft (14) supported and used for rotating in the shell body, a rotor core arranged on the shaft (14) and juxtaposed with the stator (16), a terminal (38) used for electric connection with a power source and energizing a motor, and a connector (42) with a holding device which is used for holding a PCBA (60) on the motor in solderless releasable spring offset electric connection with the terminal.

Description

Electro-motor with the releasable connection that is used for printed circuit-board assembly

Technical field

The present invention relates to have the electro-motor of PCBA connector, the PCBA connector is used for but PCBA is remained on motor in the mode that contacts with the solderless retracting spring biased electrical of the terminal of motor, and relates to the method that selectively PCBA is installed to such electro-motor.

Background technology

Known printed circuit-board assembly (PCBA) is installed on the motor shell, and then the contact on the PCBA is welded to the terminal of motor.Yet this requires to have from the client that motor manufacturer receives motor the specific PCBA of client of the motor applications that is used for requirement that essential machinery electrically connects them, or requires the client that the PCBA of requirement please motor manufacturer also be provided.This has caused some inconveniences far and away and has influenced customer service.

When welding during electric contact cold joint also be problematic, particularly in compact and limited space, for example when being connected to miniature or during little electro-motor.

Therefore the present invention seeks to provide to these ways to solve the problem.

Summary of the invention

Electro-motor is provided according to a first aspect of the invention, but electro-motor comprises motor shell, is received in stator in the housing, the supported axle that is used in housing, rotating, be installed on the axle and with the juxtaposed rotor core of stator, being used for being electrically connected with power supply fetches to the terminal of motor energising and has the PCBA connector that is used for PCBA is remained in the mode that electrically contacts with the biasing of terminal retracting spring the holding device on the motor.

Preferably, the holding device of PCBA connector comprises the PCBA housing, and the PCBA housing defines the groove that slidably inserts that is used for PCBA.

Preferably, the orientation of PCBA housing makes PCBA parallel with the rotation of motor drive shaft or parallel substantially to the direction of insertion in the groove.

Preferably, the PCBA housing is fixedly secured on the motor shell.

Preferably, the PCBA housing comprises the opening that is used near terminal.

Preferably, terminal is setovered with backup PCBA by spring.

Preferably, reel is contained in the housing, and reel comprises terminal supports, and the terminal of spring biasing is provided on the terminal supports.

Preferably, terminal is the question mark shape.

Preferably, terminal extends in the PCBA connector.

Preferably, the PCBA connector comprises pawl device, is used for cooperating releasedly with PCBA PCBA is remained on motor.

Preferably, the pawl device of PCBA connector comprises oblique the giving prominence to stop taking-up that is used to be positioned at above the edge of PCBA.

Preferably, oblique outstanding part as the PCBA connector integrally forms.

According to a second aspect of the invention, provide the electro-motor according to a first aspect of the invention that makes up with PCBA, but PCBA remains on the motor in the mode that electrically contacts with the biasing of terminal retracting spring with the holding device of static relation by the PCBA connector.

Preferably, PCBA comprises the bar that electrically contacts of mounted on surface, is used for electrically contacting with one of the terminal of electro-motor or each.

According to a third aspect of the invention we, provide the method on the electro-motor that selectively PCBA is installed to according to a first aspect of the invention, method comprises the steps: a) to select PCBA; And b) the PCBA connector with PCBA and electro-motor pushes away engage, but makes holding device that PCBA is kept static on motor and finish and the electrically contacting of terminal retracting spring biasing.

Description of drawings

To only more specifically describe embodiments of the invention with reference to the accompanying drawings by example now, each figure is:

Fig. 1 is the perspective view of first embodiment of electro-motor according to a first aspect of the invention, and electro-motor has PCBA mounted thereto according to a second aspect of the invention.

Fig. 2 shows the side sectional view of electro-motor shown in Figure 1, has the PCBA of cooperation;

Fig. 3 is the side cross-sectional view of amplification of the part of PCBA connector;

Fig. 4 is from the perspective view of the part of the downside of the terminal connector of electro-motor and terminal below and PCBA on being installed in motor the time;

Fig. 5 is a terminal connector and the perspective view of relevant terminal;

Fig. 6 is the perspective view of PCBA connector shell and terminal;

Fig. 7 is the perspective view from the below, shows the PCBA connector shown in Fig. 6 and the cross section of terminal, has the PCBA of cooperation; With

Fig. 8 is the perspective view from the below, shows the terminal that contacts with PCBA according to second embodiment.

Embodiment

Fig. 1 at first with reference to the accompanying drawings there is shown first embodiment of electro-motor 10 to Fig. 5, and electro-motor 10 comprises motor shell 12 and the supported axle 14 that is used for rotation in motor shell 12.Stator 16 is provided at the inner surfaces of contiguous motor shells 12 in the motor shell 12, and rotor core 18 is provided on the axle 14 with stator 16 and puts.

Electro-motor 10 can be the motor of any kind, and for example can be microminiature, small-sized or little PMDC motor or stepper motor.

Electro-motor 10 preferably includes two

reels

20 and 22, has received winding 24 and 26 on it.A plurality of conductions, the terminal connector 28 of typical copper facing tin is four in this case, the opening 30 in motor shell 12 extends.As in Fig. 4 and Fig. 5 best as seen, each terminal connector 28 comprises that first end 32 of bifurcated is relative with first end 32 with second end, 34, the second ends 34 that support.Terminal connector 28 is supported by motor shell 12, or as each

reel

20 and 22 that directly is attached to shown in Figure 2, and the end of

relevant winding

24,26 is by mechanically engaging with each terminal connector 28 in the fork that is pushed into first end 32.

Second end 34 of the support of each terminal connector 28 comprises

crooked part

36, and 38 of each terminals thereon.Each terminal 38 is the chip components that prolong, by the electric conducting material that is resiliently deformable for example beryllium copper form substantially question mark "? " shape.This provides the spring biasing of the far-end of terminal 38 in the direction of the end that leaves adjacent terminal connector 28, and second end 34 that supports has promoted this spring biasing.

The near-end of terminal 38 is at second end 34 of 40 places riveting to the support of terminal connector 28, as illustrating best among Fig. 5.Selectively, rivet is a upset rivet, from the main body extrusion of terminal connector 28.Therefore terminal 38 is positioned on the terminal connector 28 and by terminal connector 28 and supports definitely.

Motor 10 also comprises PCBA connector 42, and PCBA connector 42 comprises the typically PCBA housing 44 of molded plastics, and PCBA housing 44 has and is used for remaining on the PCBA connector 42 definitely PCBA or interior holding device.Holding device has the form that is limited to the groove 46 in the PCBA housing 44.PCBA housing 44 usually is a rectangle, but has the bending of the lower edge 48 of arc profile with the outer surface 50 of coupling motor shell 12.PCBA housing 44 is positioned at radial direction usually and from outstanding terminal 38 tops of motor shell 12 and typically remains on suitable position on the motor shell 12 by the snap fit engagement device.

The snap fit engagement device typically is included in oblique sheet 52 outstanding on every side of end cap 54 of motor shell 12 and corresponding flexible arm 56, and flexible arm 56 has slit 58 and outstanding from PCBA housing 44.When end cap 54 and PCBA housing 44 to one time-outs, arm 40 is positioned at its slit 58 separately upwards by each sheet 52 until each sheet 52, has therefore caused releasable joint.Being clasped in addition refers to that 51 usually radially inwardly extend and engage releasedly the edge of the opening 30 of motor shell 12 from PCBA housing 44.

The size of the groove 46 of PCBA housing 44 is decided to be to push away with slip and cooperates and accept PCBA 60.So, the channel opening 62 that groove 46 has the end cap 54 of contiguous motor shell 12 is used to receive PCBA60, and groove 46 leaves channel opening 62 in parallel with the rotation of motor drive shaft 14 substantially direction extension.

PCBA housing 44 has first shell nozzle 64 so that terminal 38 can be outstanding by it at its base portion, and has second shell nozzle 66 at its top surface, by it can observe terminal 38 and before inserting PCBA 60 near terminal 38.This is favourable allowing aspect the safeguarding of terminal 38.For example, if undesirably distortion of terminal 38, then it can easily be shaped again to take its correct position.

PCBA connector 42 also comprises pawl device, in case be used for inserting PCBA 60 is remained in the PCBA housing 44.Pawl device comprises the oblique ratchet 68 of contiguous second shell nozzle 66 on the inside upper surface that is integrally formed in PCBA housing 44.Oblique ratchet 68 is projected in the PCBA housing 44 and more specifically to being projected in the groove 46.

Contiguous its forward positions 72 of PCBA 60 are formed with ratchet slit 70, are used for complementally engaging with oblique ratchet 68.The instrument that can use small screw driver for example prizes slit 70 with the back 74 of oblique ratchet 68 and discharges, and therefore allows PCBA 60 is taken out in PCBA housing 44.

In use at first select PCBA 60.The size of the previous section 76 of PCBA 60 is decided to be the groove 46 that cooperates PCBA housing 44.PCBA 60 comprises that typically power connector 78 is used to be connected to power supply.Yet, depending on the use of requirement of client and motor, other circuit blocks can be merged into the part of PCBA.

On of the first type surface 82 of PCBA 60, provide the isolated bar 80 that electrically contacts, typically the copper dish.Electrically contact bar 80 according to the end of spring biasing the intervals between 38 open.

When PCBA 60 was correctly directed, the forward position 72 of PCBA 60 was inserted in the groove 46 of PCBA housing 44 and slides to put in place and engages with ratchet slit 70 until oblique ratchet 68.In the time of in PCBA 60 slides into PCBA housing 44, slide and slide into its electrically contacting on the bar 80 separately along the first type surface 82 of PCBA 60 in the forward position 72 that the terminal 38 of spring biasing is crossed PCBA 60.Under the help of the sweep 36 of terminal connector, therefore the biasing of the spring of terminal 38 has caused being formed on flexible between terminal 38 and the bow strip 80 and has electrically contacted.

With reference to figure 8, second embodiment of electro-motor 10 has been shown among Fig. 8.Identical reference is indicated identical part and has been omitted further and described in detail.

The other ground connection of PCBA 160 with motor shell 12 is provided in this embodiment.In this case, the metal parts of motor shell 12 provides earth element 184.Earth element 184 is identical with terminal described above 38.Yet the connection that terminal connector 28 is arrived the metal parts of motor shell 12 replaces.In the illustrated embodiment, metal parts is that stator plate 180 and terminal connector are the fingers or outstanding 182 that extends from stator plate 180.

As can be seen from Fig. 8, PCBA 160 provides and further electrically contacts bar 188, electrically contacts bar 188 electrical ground in use.Therefore, when PCBA 160 was inserted in the groove 46 of PCBA housing 44, terminal 38 and earth element 184 slided and reach along the first type surface 82 of PCBA 160 and rest on its bow strip separately, therefore cause having formed flexible electrical connection.

But therefore between the terminal of PCBA and motor, finished retracting spring biased electrical contact reliably, and do not required welding or use other permanent electric engagement devices.This makes the client convenient especially when selectively selected which PCBA uses with motor.Also can make motor be used for multiple widely application, be simple thing because the PCBA that will distinguishingly transform is inserted into the PCBA connector.Further, guarantee reliable electrical connection, and do not had the possibility of cold spot.Because the terminal of spring biasing, the loss of the electrical connection that the cracking of welding or displacement cause will no longer be a problem.

Embodiment described above only provides by example, and multiple other modifications that do not depart from the scope of the present invention that limits by subsidiary claims are obvious to those skilled in the art.

Claims

1. electro-motor, it comprises: but motor shell, be received in stator in the housing, the supported axle that is used in housing, rotating, be installed on the axle and with the juxtaposed rotor core of stator, being used for being electrically connected with power supply fetches to the terminal of motor energising and has the PCBA connector that is used for PCBA is remained in the mode that electrically contacts with the biasing of terminal retracting spring the holding device on the motor.

2. electro-motor according to claim 1, wherein the holding device of PCBA connector comprises the PCBA housing, the PCBA housing defines the groove that slidably inserts that is used for PCBA.

3. electro-motor according to claim 2, wherein the PCBA housing is orientated and makes PCBA parallel with the rotation of motor drive shaft or parallel substantially to the direction of insertion in the groove.

4. electro-motor according to claim 2, wherein the PCBA housing is fixedly secured on the motor shell.

5. electro-motor according to claim 2, wherein the PCBA housing comprises the opening that is used near terminal.

6. electro-motor according to claim 1, wherein terminal is setovered with backup PCBA by spring.

7. electro-motor according to claim 6 further comprises the reel that is contained in the housing, and reel comprises terminal supports, and the terminal of spring biasing is provided on the terminal supports.

8. electro-motor according to claim 6, wherein terminal is the question mark shape.

9. electro-motor according to claim 1, wherein terminal extends in the PCBA connector.

10. electro-motor according to claim 1, wherein the PCBA connector comprises pawl device, is used for cooperating releasedly with PCBA PCBA is remained on motor.

11. electro-motor according to claim 10, wherein the pawl device of PCBA connector comprises oblique the giving prominence to stop taking-up that is used to be positioned at above the edge of PCBA.

12. electro-motor according to claim 11, wherein oblique outstanding part as the PCBA connector integrally forms.

13. according to each the described electro-motor and the PCBA combination of aforementioned claim, but PCBA remains on the motor in the mode that electrically contacts with the biasing of terminal retracting spring with the holding device of static relation by the PCBA connector.

14. combination according to claim 13, wherein PCBA comprises the bar that electrically contacts of mounted on surface, is used for electrically contacting with one of the terminal of electro-motor or each.

15. one kind selectively is installed to PCBA according to the method for claim 1 to each described electro-motor of claim 12, this method comprises the steps: a) to select PCBA; And b) the PCBA connector with PCBA and electro-motor pushes away engage, but make holding device that PCBA is kept static on motor and finish with terminal retracting spring biasing electrically contact.